How should I store my enzyme?

This product is stable for at least two years from date of manufacture if stored unopened between -15 to – 25°C. Internal studies have shown the reconstituted enzyme is stable as a frozen solution between -15 to – 25°C for at least 3 months. Additional studies have shown the reconstituted enzyme was successfully frozen and thawed at least twice without apparent loss of potency as assessed by the CDA and NPA assays.